CONTENTS 



Descriptions of One New Genus and Fifteen New Species of 

 Tropical American Orthoptera. By James A. G. Rehn . 321 

 (Issued November 20, 1918.) 



The Comparative Morphology and Possible Adaptations of the 

 Abdomen in the Odonata. By Arthur De Witt Whedon . 373 

 (Issued January 8, 1919.) 



1317^ 



